1 files changed, 110 insertions, 0 deletions
diff --git a/java/net/URLEncoder.java b/java/net/URLEncoder.java
new file mode 100644
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+++ b/java/net/URLEncoder.java
@@ -0,0 +1,110 @@
+/*************************************************************************
+/* URLEncoder.java -- Class to convert strings to a properly encoded URL
+/*
+/* Copyright (c) 1998 by Aaron M. Renn (arenn@urbanophile.com)
+/*
+/* This program is free software; you can redistribute it and/or modify
+/* it under the terms of the GNU Library General Public License as published 
+/* by the Free Software Foundation, version 2. (see COPYING.LIB)
+/*
+/* This program is distributed in the hope that it will be useful, but
+/* WITHOUT ANY WARRANTY; without even the implied warranty of
+/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+/* GNU General Public License for more details.
+/*
+/* You should have received a copy of the GNU General Public License
+/* along with this program; if not, write to the Free Software Foundation
+/* Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307 USA
+/*************************************************************************/
+
+package java.net;
+
+/**
+  * This utility class contains one static method that converts a 
+  * string into a fully encoded URL string in x-www-form-urlencoded
+  * format.  This format replaces certain disallowed characters with
+  * encoded equivalents.  All upper case and lower case letters in the
+  * US alphabet remain as is, the space character (' ') is replaced with
+  * '+' sign, and all other characters are converted to a "%XX" format
+  * where XX is the hexadecimal representation of that character.  Note
+  * that since unicode characters are 16 bits, and this metho encodes only
+  * 8 bits of information, the lower 8 bits of the character are used.
+  * <p>
+  * This method is very useful for encoding strings to be sent to CGI scripts
+  *
+  * @version 0.5
+  *
+  * @author Aaron M. Renn (arenn@urbanophile.com)
+  */
+public class URLEncoder
+{
+
+/*************************************************************************/
+
+/*
+ * Class Variables
+ */
+
+/**
+  * A lookup table array of hexadecimal character equivalents
+  */
+protected static final char[] hexchars = { '0', '1', '2', '3', '4', '5', '6', 
+                                           '7', '8', '9', 'A', 'B', 'C', 'D', 
+                                           'E', 'F' };
+
+/*************************************************************************/
+
+/*
+ * Class Methods
+ */
+
+/**
+  * This method translates the passed in string into x-www-form-urlencoded
+  * format and returns it.
+  *
+  * @param source The String to convert
+  *
+  * @return The converted String
+  */
+public static String
+encode(String source)
+{
+  StringBuffer result = new StringBuffer("");
+
+  for (int i = 0; i < source.length(); i++)
+    {
+      // Get the low 8 bits of the next char
+      char c = source.charAt(i);
+      c &= 0xFF;
+
+      // Handle regular characters
+      if ((c >= 'A') && (c <= 'Z'))
+        {
+          result.append(c);
+          continue;
+        }
+
+      if ((c >= 'a') && (c <= 'z'))
+        {
+          result.append(c);
+          continue;
+        }
+
+      // Handle spaces
+      if (c == ' ')
+        {
+          result.append('+');
+          continue;
+        }
+
+      // Handle everything else
+      result.append('%');
+      result.append(hexchars[ c / 16 ]);
+      result.append(hexchars[ c % 16 ]);
+    }
+
+  return(result.toString());
+}
+
+} // class URLEncoder
+